X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=NEWS;h=816a3aae8536f95abeac56e34ba75c61089b2347;hb=04a637ae64582e8830205c42cc6d9ef4aabc969a;hp=24a61f4a4cebce7e227c5e6f0d61adab99f5fe94;hpb=eaa2d81474e20f98dc60d3e2356db4ff8f7ce076;p=platform%2Fupstream%2Fgstreamer.git diff --git a/NEWS b/NEWS index 24a61f4..816a3aa 100644 --- a/NEWS +++ b/NEWS @@ -1,8 +1,1392 @@ -This is GStreamer 0.11.1 "Sweet New Blossom" -New featues in 0.11.1: - * Parallel installability with 0.10.x series - * Remove negotiation from state change in GstBaseSrc - * Removed our custom FOURCC type - * Updates to the base classes +GSTREAMER 1.16 RELEASE NOTES + + +GStreamer 1.16.0 was originally released on 19 April 2019. + +See https://gstreamer.freedesktop.org/releases/1.16/ for the latest +version of this document. + +_Last updated: Friday 19 April 2019, 00:00 UTC (log)_ + + +Introduction + +The GStreamer team is proud to announce a new major feature release in +the stable 1.x API series of your favourite cross-platform multimedia +framework! + +As always, this release is again packed with many new features, bug +fixes and other improvements. + + +Highlights + +- GStreamer WebRTC stack gained support for data channels for + peer-to-peer communication based on SCTP, BUNDLE support, as well as + support for multiple TURN servers. + +- AV1 video codec support for Matroska and QuickTime/MP4 containers + and more configuration options and supported input formats for the + AOMedia AV1 encoder + +- Support for Closed Captions and other Ancillary Data in video + +- Support for planar (non-interleaved) raw audio + +- GstVideoAggregator, compositor and OpenGL mixer elements are now in + -base + +- New alternate fields interlace mode where each buffer carries a + single field + +- WebM and Matroska ContentEncryption support in the Matroska demuxer + +- new WebKit WPE-based web browser source element + +- Video4Linux: HEVC encoding and decoding, JPEG encoding, and improved + dmabuf import/export + +- Hardware-accelerated Nvidia video decoder gained support for VP8/VP9 + decoding, whilst the encoder gained support for H.265/HEVC encoding. + +- Many improvements to the Intel Media SDK based hardware-accelerated + video decoder and encoder plugin (msdk): dmabuf import/export for + zero-copy integration with other components; VP9 decoding; 10-bit + HEVC encoding; video post-processing (vpp) support including + deinterlacing; and the video decoder now handles dynamic resolution + changes. + +- The ASS/SSA subtitle overlay renderer can now handle multiple + subtitles that overlap in time and will show them on screen + simultaneously + +- The Meson build is now feature-complete (*) and it is now the + recommended build system on all platforms. The Autotools build is + scheduled to be removed in the next cycle. + +- The GStreamer Rust bindings and Rust plugins module are now + officially part of upstream GStreamer. + +- The GStreamer Editing Services gained a gesdemux element that allows + directly playing back serialized edit list with playbin or + (uri)decodebin + +- Many performance improvements + + +Major new features and changes + +Noteworthy new API + +- GstAggregator has a new "min-upstream-latency" property that forces + a minimum aggregate latency for the input branches of an aggregator. + This is useful for dynamic pipelines where branches with a higher + latency might be added later after the pipeline is already up and + running and where a change in the latency would be disruptive. This + only applies to the case where at least one of the input branches is + live though, it won’t force the aggregator into live mode in the + absence of any live inputs. + +- GstBaseSink gained a "processing-deadline" property and + setter/getter API to configure a processing deadline for live + pipelines. The processing deadline is the acceptable amount of time + to process the media in a live pipeline before it reaches the sink. + This is on top of the systemic latency that is normally reported by + the latency query. This defaults to 20ms and should make pipelines + such as v4l2src ! xvimagesink not claim that all frames are late in + the QoS events. Ideally, this should replace the "max-lateness" + property for most applications. + +- RTCP Extended Reports (XR) parsing according to RFC 3611: + Loss/Duplicate RLE, Packet Receipt Times, Receiver Reference Time, + Delay since the last Receiver (DLRR), Statistics Summary, and VoIP + Metrics reports. This only provides the ability to parse such + packets, generation of XR packets is not supported yet and XR + packets are not automatically parsed by rtpbin / rtpsession but must + be actively handled by the application. + +- a new mode for interlaced video was added where each buffer carries + a single field of interlaced video, with buffer flags indicating + whether the field is the top field or bottom field. Top and bottom + fields are expected to alternate in this mode. Caps for this + interlace mode must also carry a format:Interlaced caps feature to + ensure backwards compatibility. + +- The video library has gained support for three new raw pixel + formats: + + - Y410: packed 4:4:4 YUV, 10 bits per channel + - Y210: packed 4:2:2 YUV, 10 bits per channel + - NV12_10LE40: fully-packed 10-bit variant of NV12_10LE32, + i.e. without the padding bits + +- GstRTPSourceMeta is a new meta that can be used to transport + information about the origin of depayloaded or decoded RTP buffers, + e.g. when mixing audio from multiple sources into a single stream. A + new "source-info" property on the RTP depayloader base class + determines whether depayloaders should put this meta on outgoing + buffers. Similarly, the same property on RTP payloaders determines + whether they should use the information from this meta to construct + the CSRCs list on outgoing RTP buffers. + +- gst_sdp_message_from_text() is a convenience constructor to parse + SDPs from a string which is particularly useful for language + bindings. + +Support for Planar (Non-Interleaved) Raw Audio + +Raw audio samples are usually passed around in interleaved form in +GStreamer, which means that if there are multiple audio channels the +samples for each channel are interleaved in memory, e.g. +|LEFT|RIGHT|LEFT|RIGHT|LEFT|RIGHT| for stereo audio. A non-interleaved +or planar arrangement in memory would look like +|LEFT|LEFT|LEFT|RIGHT|RIGHT|RIGHT| instead, possibly with +|LEFT|LEFT|LEFT| and |RIGHT|RIGHT|RIGHT| residing in separate memory +chunks or separated by some padding. + +GStreamer has always had signalling for non-interleaved audio since +version 1.0, but it was never actually properly implemented in any +elements. audioconvert would advertise support for it, but wasn’t +actually able to handle it correctly. + +With this release we now have full support for non-interleaved audio as +well, which means more efficient integration with external APIs that +handle audio this way, but also more efficient processing of certain +operations like interleaving multiple 1-channel streams into a +multi-channel stream which can be done without memory copies now. + +New API to support this has been added to the GStreamer Audio support +library: There is now a new GstAudioMeta which describes how data is +laid out inside the buffer, and buffers with non-interleaved audio must +always carry this meta. To access the non-interleaved audio samples you +must map such buffers with gst_audio_buffer_map() which works much like +gst_buffer_map() or gst_video_frame_map() in that it will populate a +little GstAudioBuffer helper structure passed to it with the number of +samples, the number of planes and pointers to the start of each plane in +memory. This function can also be used to map interleaved audio buffers +in which case there will be only one plane of interleaved samples. + +Of course support for this has also been implemented in the various +audio helper and conversion APIs, base classes, and in elements such as +audioconvert, audioresample, audiotestsrc, audiorate. + +Support for Closed Captions and Other Ancillary Data in Video + +The video support library has gained support for detecting and +extracting Ancillary Data from videos as per the SMPTE S291M +specification, including: + +- a VBI (Vertical Blanking Interval) parser that can detect and + extract Ancillary Data from Vertical Blanking Interval lines of + component signals. This is currently supported for videos in v210 + and UYVY format. + +- a new GstMeta for closed captions: GstVideoCaptionMeta. This + supports the two types of closed captions, CEA-608 and CEA-708, + along with the four different ways they can be transported (other + systems are a superset of those). + +- a VBI (Vertical Blanking Interval) encoder for writing ancillary + data to the Vertical Blanking Interval lines of component signals. + +The new closedcaption plugin in gst-plugins-bad then makes use of all +this new infrastructure and provides the following elements: + +- cccombiner: a closed caption combiner that takes a closed captions + stream and another stream and adds the closed captions as + GstVideoCaptionMeta to the buffers of the other stream. + +- ccextractor: a closed caption extractor which will take + GstVideoCaptionMeta from input buffers and output them as a separate + closed captions stream. + +- ccconverter: a closed caption converter that can convert between + different formats + +- line21encoder, line21decoder: inject/extract line21 closed captions + to/from SD video streams + +- cc708overlay: decodes CEA 608/708 captions and overlays them on + video + +Additionally, the following elements have also gained Closed Caption +support: + +- qtdemux and qtmux support CEA 608/708 Closed Caption tracks + +- mpegvideoparse, h264parse extracts Closed Captions from MPEG-2/H.264 + video streams + +- avviddec, avvidenc, x264enc got support for extracting/injecting + Closed Captions + +- decklinkvideosink can output closed captions and decklinkvideosrc + can extract closed captions + +- playbin and playbin3 learned how to autoplug CEA 608/708 CC overlay + elements + +- the externally maintained ajavideosrc element for AJA capture cards + has support for extracting closed captions + +The rsclosedcaption plugin in the Rust plugins collection includes a +MacCaption (MCC) file parser and encoder. + +New Elements + +- overlaycomposition: New element that allows applications to draw + GstVideoOverlayCompositions on a stream. The element will emit the + "draw" signal for each video buffer, and the application then + generates an overlay for that frame (or not). This is much more + performant than e.g. cairooverlay for many use cases, e.g. because + pixel format conversions can be avoided or the blitting of the + overlay can be delegated to downstream elements (such as + gloverlaycompositor). It’s particularly useful for cases where only + a small section of the video frame should be drawn on. + +- gloverlaycompositor: New OpenGL-based compositor element that + flattens any overlays from GstVideoOverlayCompositionMetas into the + video stream. This element is also always part of glimagesink. + +- glalpha: New element that adds an alpha channel to a video stream. + The values of the alpha channel can either be set to a constant or + can be dynamically calculated via chroma keying. It is similar to + the existing alpha element but based on OpenGL. Calculations are + done in floating point so results may not be identical to the output + of the existing alpha element. + +- rtpfunnel funnels together RTP streams into a single session. Use + cases include multiplexing and bundle. webrtcbin uses it to + implement BUNDLE support. + +- testsrcbin is a source element that provides an audio and/or video + stream and also announces them using the recently-introduced + GstStream API. This is useful for testing elements such as playbin3 + or uridecodebin3 etc. + +- New closed caption elements: cccombiner, ccextractor, ccconverter, + line21encoder, line21decoder and cc708overlay (see above) + +- wpesrc: new source element acting as a Web Browser based on WebKit + WPE + +- Two new OpenCV-based elements: cameracalibrate and cameraundistort + that can communicate to figure out distortion correction parameters + for a camera and correct for the distortion. + +- New sctp plugin based on usrsctp with sctpenc and sctpdec elements. + These elements are used inside webrtcbin for implementing data + channels. + +New element features and additions + +- playbin3, playbin and playsink have gained a new "text-offset" + property to adjust the positioning of the selected subtitle stream + vis-a-vis the audio and video streams. This uses subtitleoverlay’s + new "subtitle-ts-offset" property. GstPlayer has gained matching API + for this, namely gst_player_get_text_video_offset(). + +- playbin3 buffering improvements: in network playback scenarios there + may be multiple inputs to decodebin3, and buffering will be done + before decodebin3 using queue2 or downloadbuffer elements inside + urisourcebin. Since this is before any parsers or demuxers there may + not be any bitrate information available for the various streams, so + it was difficult to configure the buffering there smartly within + global constraints. This was improved now: The queue2 elements + inside urisourcebin will now use the new bitrate query to figure out + a bitrate estimate for the stream if no bitrate was provided by + upstream, and urisourcebin will use the bitrates of the individual + queues to distribute the globally-set "buffer-size" budget in bytes + to the various queues. urisourcebin also gained "low-watermark" and + "high-watermark" properties which will be proxied to the internal + queues, as well as a read-only "statistics" property which allows + querying of the minimum/maximum/average byte and time levels of the + queues inside the urisourcebin in question. + +- splitmuxsink has gained a couple of new features: + + - new "async-finalize" mode: This mode is useful for muxers or + outputs that can take a long time to finalize a file. Instead of + blocking the whole upstream pipeline while the muxer is doing + its stuff, we can unlink it and spawn a new muxer + sink + combination to continue running normally. This requires us to + receive the muxer and sink (if needed) as factories via the new + "muxer-factory" and "sink-factory" properties, optionally + accompanied by their respective properties structures (set via + the new "muxer-properties" and "sink-properties" properties). + There are also new "muxer-added" and "sink-added" signals in + case custom code has to be called for them to configure them. + + - "split-at-running-time" action signal: When called by the user, + this action signal ends the current file (and starts a new one) + as soon as the given running time is reached. If called multiple + times, running times are queued up and processed in the order + they were given. + + - "split-after" action signal to finish outputting the current GOP + to the current file and then start a new file as soon as the GOP + is finished and a new GOP is opened (unlike the existing + "split-now" which immediately finishes the current file and + writes the current GOP into the next newly-started file). + + - "reset-muxer" property: when unset, the muxer is reset using + flush events instead of setting its state to NULL and back. This + means the muxer can keep state across resets, e.g. mpegtsmux + will keep the continuity counter continuous across segments as + required by hlssink2. + +- qtdemux gained PIFF track encryption box support in addition to the + already-existing PIFF sample encryption support, and also allows + applications to select which encryption system to use via a + "drm-preferred-decryption-system-id" context in case there are + multiple options. + +- qtmux: the "start-gap-threshold" property determines now whether an + edit list will be created to account for small gaps or offsets at + the beginning of a stream in case the start timestamps of tracks + don’t line up perfectly. Previously the threshold was hard-coded to + 1% of the (video) frame duration, now it is 0 by default (so edit + list will be created even for small differences), but fully + configurable. + +- rtpjitterbuffer has improved end-of-stream handling + +- rtpmp4vpay will be prefered over rtpmp4gpay for MPEG-4 video in + autoplugging scenarios now + +- rtspsrc now allows applications to send RTSP SET_PARAMETER and + GET_PARAMETER requests using action signals. + +- rtspsrc has a small (100ms) configurable teardown delay by default + to try and make sure an RTSP TEARDOWN request gets sent out when the + source element shuts down. This will block the downward PAUSED to + READY state change for a short time, but can be disabled where it’s + a problem. Some servers only allow a limited number of concurrent + clients, so if no proper TEARDOWN is sent new clients may have + problems connecting to the server for a while. + +- souphttpsrc behaves better with low bitrate streams now. Before it + would increase the read block size too quickly which could lead to + it not reading any data from the socket for a very long time with + low bitrate streams that are output live downstream. This could lead + to servers kicking off the client. + +- filesink: do internal buffering to avoid performance regression with + small writes since we bypass libc buffering by using writev() + instead of fwrite() + +- identity: add "eos-after" property and fix "error-after" property + when the element is reused + +- input-selector: lets context queries pass through, so that + e.g. upstream OpenGL elements can use contexts and displays + advertised by downstream elements + +- queue2: avoid ping-pong between 0% and 100% buffering messages if + upstream is pushing buffers larger than one of its limits, plus + performance optimisations + +- opusdec: new "phase-inversion" property to control phase inversion. + When enabled, this will slightly increase stereo quality, but + produces a stream that when downmixed to mono will suffer audio + distortions. + +- The x265enc HEVC encoder also exposes a "key-int-max" property to + configure the maximum allowed GOP size now. + +- decklinkvideosink has seen stability improvements for long-running + pipelines (potential crash due to overflow of leaked clock refcount) + and clock-slaving improvements when performing flushing seeks + (causing stalls in the output timeline), pausing and/or buffering. + +- srtpdec, srtpenc: add support for MKIs which allow multiple keys to + be used with a single SRTP stream + +- srtpdec, srtpenc: add support for AES-GCM and also add support for + it in gst-rtsp-server and rtspsrc. + +- The srt Secure Reliable Transport plugin has integrated server and + client elements srt{client,server}{src,sink} into one (srtsrc and + srtsink), since SRT connection mode can be changed by uri + parameters. + +- h264parse and h265parse will handle SEI recovery point messages and + mark recovery points as keyframes as well (in addition to IDR + frames) + +- webrtcbin: "add-turn-server" action signal to pass multiple ICE + relays (TURN servers). + +- The removesilence element has received various new features and + properties, such as a "threshold" property, detecting silence only + after minimum silence time/buffers, a "silent" property to control + bus message notifications as well as a "squash" property. + +- AOMedia AV1 decoder gained support for 10/12bit decoding whilst the + AV1 encoder supports more image formats and subsamplings now and + acquired support for rate control and profile related configuration. + +- The Fraunhofer fdkaac plugin can now be built against the 2.0.0 + version API and has improved multichannel support + +- kmssink now supports unpadded 24-bit RGB and can configure mode + setting from video info, which enables display of multi-planar + formats such as I420 or NV12 with modesetting. It has also gained a + number of new properties: The "restore-crtc" property does what it + says on the tin and is enabled by default. "plane-properties" and + "connector-properties" can be used to pass custom properties to the + DRM. + +- waylandsink has a "fullscreen" property now and supports the + XDG-Shell protocol. + +- decklinkvideosink, decklinkvideosrc support selecting between + half/full duplex + +- The vulkan plugin gained support for macOS and iOS via MoltenVK in + addition to the existing support for X11 and Wayland + +- imagefreeze has a new num-buffers property to limit the number of + buffers that are produced and to send an EOS event afterwards + +- webrtcbin has a new, introspectable get-transceiver signal in + addition to the old get-transceivers signal that couldn’t be used + from bindings + +- Support for per-element latency information was added to the latency + tracer + +Plugin and library moves + +- The stereo element was moved from -bad into the existing audiofx + plugin in -good. If you get duplicate type registration warnings + when upgrading, check that you don’t have a stale stereoplugin lying + about somewhere. + +GstVideoAggregator, compositor, and OpenGL mixer elements moved from -bad to -base + +GstVideoAggregator is a new base class for raw video mixers and muxers +and is based on GstAggregator. It provides defined-latency mixing of raw +video inputs and ensures that the pipeline won’t stall even if one of +the input streams stops producing data. + +As part of the move to stabilise the API there were some last-minute API +changes and clean-ups, but those should mostly affect internal elements. +Most notably, the "ignore-eos" pad property was renamed to +"repeat-after-eos" and the conversion code was moved to a +GstVideoAggregatorConvertPad subclass to avoid code duplication, make +things less awkward for subclasses like the OpenGL-based video mixer, +and make the API more consistent with the audio aggregator API. + +It is used by the compositor element, which is a replacement for +‘videomixer’ which did not handle live inputs very well. compositor +should behave much better in that respect and generally behave as one +would expected in most scenarios. + +The compositor element has gained support for per-pad blending mode +operators (SOURCE, OVER, ADD) which determines what operator to use for +blending this pad over the previous ones. This can be used to implement +crossfading and the available operators can be extended in the future as +needed. + +A number of OpenGL-based video mixer elements (glvideomixer, glmixerbin, +glvideomixerelement, glstereomix, glmosaic) which are built on top of +GstVideoAggregator have also been moved from -bad to -base now. These +elements have been merged into the existing OpenGL plugin, so if you get +duplicate type registration warnings when upgrading, check that you +don’t have a stale openglmixers plugin lying about somewhere. + +Plugin removals + +The following plugins have been removed from gst-plugins-bad: + +- The experimental daala plugin has been removed, since it’s not so + useful now that all effort is focused on AV1 instead, and it had to + be enabled explicitly with --enable-experimental anyway. + +- The spc plugin has been removed. It has been replaced by the gme + plugin. + +- The acmmp3dec and acmenc plugins for Windows have been removed. ACM + is an ancient legacy API and there was no point in keeping the + plugins around for a licensed MP3 decoder now that the MP3 patents + have expired and we have a decoder in -good. We also didn’t ship + these in our cerbero-built Windows packages, so it’s unlikely that + they’ll be missed. + + +Miscellaneous API additions + +- GstBitwriter: new generic bit writer API to complement the existing + bit reader + +- gst_buffer_new_wrapped_bytes() creates a wrap buffer from a GBytes + +- gst_caps_set_features_simple() sets a caps feature on all the + structures of a GstCaps + +- New GST_QUERY_BITRATE query: This allows determining from downstream + what the expected bitrate of a stream may be which is useful in + queue2 for setting time based limits when upstream does not provide + timing information. tsdemux, qtdemux and matroskademux have basic + support for this query on their sink pads. + +- elements: there is a new “Hardware” class specifier. Elements + interacting with hardware devices should specify this classifier in + their element factory class metadata. This is useful to advertise as + one might need to put such elements into READY state to test if the + hardware is present in the system for example. + +- protection: Add a new definition for unspecified system protection, + GST_PROTECTION_UNSPECIFIED_SYSTEM_ID + +- take functions for various mini objects that didn’t have them yet: + gst_query_take(), gst_message_take(), gst_tag_list_take(), + gst_buffer_list_take(). Unlike the various _replace() functions + _take() does not increase the reference count but takes ownership of + the mini object passed. + +- clear functions for various mini object types and GstObject which + unrefs the object or mini object (if non-NULL) and sets the variable + pointed to to NULL: gst_clear_structure(), gst_clear_tag_list(), + gst_clear_query(), gst_clear_message(), gst_clear_event(), + gst_clear_caps(), gst_clear_buffer_list(), gst_clear_buffer(), + gst_clear_mini_object(), gst_clear_object() + +- miniobject: new API gst_mini_object_add_parent() and + gst_mini_object_remove_parent() to set parent pointers on mini + objects to ensure correct writability: Every container of + miniobjects now needs to store itself as parent in the child object, + and remove itself again later. A mini object is then only writable + if there is at most one parent, that parent is writable itself, and + the reference count of the mini object is 1. GstBuffer (for + memories), GstBufferList (for buffers), GstSample (for caps, buffer, + bufferlist), and GstVideoOverlayComposition were updated + accordingly. Without this it was possible to have e.g. a buffer list + with a refcount of 2 used in two places at once that both modify the + same buffer with refcount 1 at the same time wrongly thinking it is + writable even though it’s really not. + +- poll: add API to watch for POLLPRI and stop treating POLLPRI as a + read. This is useful to wait for video4linux events which are + signalled via POLLPRI. + +- sample: new API to update the contents of a GstSample and make it + writable: gst_sample_set_buffer(), gst_sample_set_caps(), + gst_sample_set_segment(), gst_sample_set_info(), plus + gst_sample_is_writable() and gst_sample_make_writable(). This makes + it possible to reuse a sample object and avoid unnecessary memory + allocations, for example in appsink. + +- ClockIDs now keep a weak reference to underlying clock to avoid + crashes in basesink in corner cases where a clock goes away while + the ClockID is still in use, plus some new API + (gst_clock_id_get_clock(), gst_clock_id_uses_clock()) to check the + clock a ClockID is linked to. + +- The GstCheck unit test library gained a + fail_unless_equals_clocktime() convenience macro as well as some new + GstHarness API for for proposing meta APIs from the allocation + query: gst_harness_add_propose_allocation_meta(). ASSERT_CRITICAL() + checks in unit tests are now skipped if GStreamer was compiled with + GST_DISABLE_GLIB_CHECKS. + +- gst_audio_buffer_truncate() convenience function to truncate a raw + audio buffer + +- GstDiscoverer has support for caching the results of discovery in + the default cache directory. This can be enabled with the use-cache + property and is disabled by default. + +- GstMeta that are attached to GstBuffers are now always stored in the + order in which they were added. + +- Additional support for signalling ONVIF specific features were + added: the SEEK event can store a trickmode-interval now and support + for the Rate-Control and Frames RTSP headers was added to the RTSP + library. + + +Miscellaneous performance and memory optimisations + +As always there have been many performance and memory usage improvements +across all components and modules. Some of them (such as dmabuf +import/export) have already been mentioned elsewhere so won’t be +repeated here. + +The following list is only a small snapshot of some of the more +interesting optimisations that haven’t been mentioned in other contexts +yet: + +- The GstVideoEncoder and GstVideoDecoder base classes now release the + STREAM_LOCK when pushing out buffers, which means (multi-threaded) + encoders and decoders can now receive and continue to process input + buffers whilst waiting for downstream elements in the pipeline to + process the buffer that was pushed out. This increases throughput + and reduces processing latency, also and especially for + hardware-accelerated encoder/decoder elements. + +- GstQueueArray has seen a few API additions + (gst_queue_array_peek_nth(), gst_queue_array_set_clear_func(), + gst_queue_array_clear()) so that it can be used in other places like + GstAdapter instead of a GList, which reduces allocations and + improves performance. + +- appsink now reuses the sample object in pull_sample() if possible + +- rtpsession only starts the RTCP thread when it’s actually needed now + +- udpsrc uses a buffer pool now and the GstUdpSrc object structure was + optimised for better cache performance + +GstPlayer + +- API was added to fine-tune the synchronisation offset between + subtitles and video + + +Miscellaneous changes + +- As a result of moving to newer FFmpeg APIs, encoder and decoder + elements exposed by the GStreamer FFmpeg wrapper plugin (gst-libav) + may have seen possibly incompatible changes to property names and/or + types, and not all properties exposed might be functional. We are + still reviewing the new properties and aim to minimise breaking + changes at least for the most commonly-used properties, so please + report any issues you run into! + +OpenGL integration + +- The OpenGL mixer elements have been moved from -bad to + gst-plugins-base (see above) + +- The Mesa GBM backend now supports headless mode + +- gloverlaycompositor: New OpenGL-based compositor element that + flattens any overlays from GstVideoOverlayCompositionMetas into the + video stream. + +- glalpha: New element that adds an alpha channel to a video stream. + The values of the alpha channel can either be set to a constant or + can be dynamically calculated via chroma keying. It is similar to + the existing alpha element but based on OpenGL. Calculations are + done in floating point so results may not be identical to the output + of the existing alpha element. + +- glupload: Implement direct dmabuf uploader, the idea being that some + GPUs (like the Vivante series) can actually perform the YUV->RGB + conversion internally, so no custom conversion shaders are needed. + To make use of this feature, we need an additional uploader that can + import DMABUF FDs and also directly pass the pixel format, relying + on the GPU to do the conversion. + +- The OpenGL library no longer restores the OpenGL viewport. This is a + performance optimization to not require performing multiple + expensive glGet*() function calls per frame. This affects any + application or plugin use of the following functions and objects: + - glcolorconvert library object (not the element) + - glviewconvert library object (not the element) + - gst_gl_framebuffer_draw_to_texture() + - custom GstGLWindow implementations + + +Tracing framework and debugging improvements + +- There is now a GDB PRETTY PRINTER FOR VARIOUS GSTREAMER TYPES: For + GstObject pointers the type and name is added, e.g. + 0x5555557e4110 [GstDecodeBin|decodebin0]. For GstMiniObject pointers + the object type is added, e.g. 0x7fffe001fc50 [GstBuffer]. For + GstClockTime and GstClockTimeDiff the time is also printed in human + readable form, e.g. 150116219955 [+0:02:30.116219955]. + +- GDB EXTENSION WITH TWO CUSTOM GDB COMMANDS gst-dot AND gst-print: + + - gst-dot creates dot files that a very close to what + GST_DEBUG_BIN_TO_DOT_FILE() produces, but object properties and + buffer contents such as codec-data in caps are not available. + + - gst-print produces high-level information about a GStreamer + object. This is currently limited to pads for GstElements and + events for the pads. The output may look like this: + +- gst_structure_to_string() now serialises the actual value of + pointers when serialising GstStructures instead of claiming they’re + NULL. This makes debug logging in various places less confusing, + because it’s clear now that structure fields actually hold valid + objects. Such object pointer values will never be deserialised + however. + + +Tools + +- gst-inspect-1.0 has coloured output now and will automatically use a + pager if the output does not fit on a page. This only works in a + UNIX environment and if the output is not piped, and on Windows 10 + build 16257 or newer. If you don’t like the colours you can disable + them by setting the GST_INSPECT_NO_COLORS=1 environment variable or + passing the --no-color command line option. + + +GStreamer RTSP server + +- Improved backlog handling when using TCP interleaved for data + transport. Before there was a fixed maximum size for backlog + messages, which was prone to deadlocks and made it difficult to + control memory usage with the watch backlog. The RTSP server now + limits queued TCP data messages to one per stream, moving queuing of + the data into the pipeline and leaving the RTSP connection + responsive to RTSP messages in both directions, preventing all those + problems. + +- Initial ULP Forward Error Correction support in rtspclientsink and + for RECORD mode in the server. + +- API to explicitly enable retransmission requests (RTX) + +- Lots of multicast-related fixes + +- rtsp-auth: Add support for parsing .htdigest files + + +GStreamer VAAPI + +- Support Wayland’s display for context sharing, so the application + can pass its own wl_display in order to be used for the VAAPI + display creation. + +- A lot of work to support new Intel hardware using media-driver as VA + backend. + +- For non-x86 devices, VAAPI display can instantiate, through DRM, + with no PCI bus. This enables the usage of libva-v4l2-request + driver. + +- Added support for XDG-shell protocol as wl_shell replacement which + is currently deprecated. This change add as dependency + wayland-protocol. + +- GstVaapiFilter, GstVaapiWindow, and GstVaapiDecoder classes now + inherit from GstObject, gaining all the GStreamer’s instrumentation + support. + +- The metadata now specifies the plugin as Hardware class. + +- H264 decoder is more stable with problematic streams. + +- In H265 decoder added support for profiles main-422-10 (P010_10LE), + main-444 (AYUV) and main-444-10 (Y410) + +- JPEG decoder handles dynamic resolution changes. + +- More specification adherence in H264 and H265 encoders. + + +GStreamer OMX + +- Add support of NV16 format to video encoders input. + +- Video decoders now handle the ALLOCATION query to tell upstream + about the number of buffers they require. Video encoders will also + use this query to adjust their number of allocated buffers + preventing starvation when using dynamic buffer mode. + +- The OMX_PERFORMANCE debug category has been renamed to OMX_API_TRACE + and can now be used to track a widder variety of interactions + between OMX and GStreamer. + +- Video encoders will now detect frame rate only changes and will + inform OMX about it rather than doing a full format reset. + +- Various Zynq UltraScale+ specific improvements: + - Video encoders are now able to import dmabuf from upstream. + - Support for HEVC range extension profiles and more AVC profiles. + - We can now request video encoders to generate an IDR using the + force key unit event. + + +GStreamer Editing Services and NLE + +- Added a gesdemux element, it is an auto pluggable element that + allows decoding edit list like files supported by GES + +- Added gessrc which wraps a GESTimeline as a standard source element + (implementing the ges protocol handler) + +- Added basic support for videorate::rate property potentially + allowing changing playback speed + +- Layer priority is now fully automatic and they should be moved with + the new ges_timeline_move_layer method, ges_layer_set_priority is + now deprecated. + +- Added a ges_timeline_element_get_layer_priority so we can simply get + all information about GESTimelineElement position in the timeline + +- GESVideoSource now auto orientates the images if it is defined in a + meta (overridable). + +- Added some PyGObject overrides to make the API more pythonic + +- The threading model has been made more explicit with safe guard to + make sure not thread safe APIs are not used from the wrong threads. + It is also now possible to properly handle in what thread the API + should be used. + +- Optimized GESClip and GESTrackElement creation + +- Added a way to compile out the old, unused and deprecated + GESPitiviFormatter + +- Re implemented the timeline editing API making it faster and making + the code much more maintainable + +- Simplified usage of nlecomposition outside GES by removing quirks in + it API usage and removing the need to treat it specially from an + application perspective. + +- ges-launch-1.0: + + - Added support to add titles to the timeline + - Enhance the help auto generating it from the code + +- Deprecate ges_timeline_load_from_uri as loading the timeline should + be done through a project now + +- MANY leaks have been plugged and the unit testsuite is now “leak + free” + + +GStreamer validate + +- Added an action type to verify the checksum of the sink last-sample + +- Added an include keyword to validate scenarios + +- Added the notion of variable in scenarios, with the set-vars keyword + +- Started adding support for “performance” like tests by allowing to + define the number of dropped buffers or the minimum buffer frequency + on a specific pad + +- Added a validateflow plugin which allows defining the data flow to + be seen on a particular pad and verifying that following runs match + the expectations + +- Added support for appsrc based test definition so we can instrument + the data pushed into the pipeline from scenarios + +- Added a mockdecryptor allowing adding tests with on encrypted files, + the element will potentially be instrumented with a validate + scenario + +- gst-validate-launcher: + + - Cleaned up output + + - Changed the default for “muting” tests as user doesn’t expect + hundreds of windows to show up when running the testsuite + + - Fixed the outputted xunit files to be compatible with GitLab + + - Added support to run tests on media files in push mode (using + pushfile://) + + - Added support for running inside gst-build + + - Added support for running ssim tests on rendered files + + - Added a way to simply define tests on pipelines through a simple + .json file + + - Added a python app to easily run python testsuite reusing all + the launcher features + + - Added flatpak knowledge so we can print backtrace even when + running from within flatpak + + - Added a way to automatically generated “known issues” + suppressions lines + + - Added a way to rerun tests to check if they are flaky and added + a way to tolerate tests known to be flaky + + - Add a way to output html log files + + +GStreamer Python Bindings + +- add binding for gst_pad_set_caps() + +- pygobject dependency requirement was bumped to >= 3.8 + +- new audiotestsrc, audioplot, and mixer plugin examples, and a + dynamic pipeline example + + +GStreamer C# Bindings + +- bindings for the GstWebRTC library + + +GStreamer Rust Bindings + +The GStreamer Rust bindings are now officially part of the GStreamer +project and are also maintained in the GStreamer GitLab. + +The releases will generally not be synchronized with the releases of +other GStreamer parts due to dependencies on other projects. + +Also unlike the other GStreamer libraries, the bindings will not commit +to full API stability but instead will follow the approach that is +generally taken by Rust projects, e.g.: + +1) 0.12.X will be completely API compatible with all other 0.12.Y + versions. +2) 0.12.X+1 will contain bugfixes and compatible new feature additions. +3) 0.13.0 will _not_ be backwards compatible with 0.12.X but projects + will be able to stay at 0.12.X without any problems as long as they + don’t need newer features. + +The current stable release is 0.12.2 and the next release series will be +0.13, probably around March 2019. + +At this point the bindings cover most of GStreamer core (except for most +notably GstAllocator and GstMemory), and most parts of the app, audio, +base, check, editing-services, gl, net. pbutils, player, rtsp, +rtsp-server, sdp, video and webrtc libraries. + +Also included is support for creating subclasses of the following types +and writing GStreamer plugins: + +- gst::Element +- gst::Bin and gst::Pipeline +- gst::URIHandler and gst::ChildProxy +- gst::Pad, gst::GhostPad +- gst_base::Aggregator and gst_base::AggregatorPad +- gst_base::BaseSrc and gst_base::BaseSink +- gst_base::BaseTransform + +Changes to 0.12.X since 0.12.0 + +Fixed + +- PTP clock constructor actually creates a PTP instead of NTP clock + +Added + +- Bindings for GStreamer Editing Services +- Bindings for GStreamer Check testing library +- Bindings for the encoding profile API (encodebin) + +- VideoFrame, VideoInfo, AudioInfo, StructureRef implements Send and + Sync now +- VideoFrame has a function to get the raw FFI pointer +- From impls from the Error/Success enums to the combined enums like + FlowReturn +- Bin-to-dot file functions were added to the Bin trait +- gst_base::Adapter implements SendUnique now +- More complete bindings for the gst_video::VideoOverlay interface, + especially + gst_video::is_video_overlay_prepare_window_handle_message() + +Changed + +- All references were updated from GitHub to freedesktop.org GitLab +- Fix various links in the README.md +- Link to the correct location for the documentation +- Remove GitLab badge as that only works with gitlab.com currently + +Changes in git master for 0.13 + +Fixed + +- gst::tag::Album is the album tag now instead of artist sortname + +Added + +- Subclassing infrastructure was moved directly into the bindings, + making the gst-plugin crate deprecated. This involves many API + changes but generally cleans up code and makes it more flexible. + Take a look at the gst-plugins-rs crate for various examples. + +- Bindings for CapsFeatures and Meta +- Bindings for + ParentBufferMeta,VideoMetaandVideoOverlayCompositionMeta` +- Bindings for VideoOverlayComposition and VideoOverlayRectangle +- Bindings for VideoTimeCode + +- UniqueFlowCombiner and UniqueAdapter wrappers that make use of the + Rust compile-time mutability checks and expose more API in a safe + way, and as a side-effect implement Sync and Send now + +- More complete bindings for Allocation Query +- pbutils functions for codec descriptions +- TagList::iter() for iterating over all tags while getting a single + value per tag. The old ::iter_tag_list() function was renamed to + ::iter_generic() and still provides access to each value for a tag +- Bus::iter() and Bus::iter_timed() iterators around the corresponding + ::pop\*() functions + +- serde serialization of Value can also handle Buffer now + +- Extensive comments to all examples with explanations +- Transmuxing example showing how to use typefind, multiqueue and + dynamic pads +- basic-tutorial-12 was ported and added + +Changed + +- Rust 1.31 is the minimum supported Rust version now +- Update to latest gir code generator and glib bindings + +- Functions returning e.g. gst::FlowReturn or other “combined” enums + were changed to return split enums like + Result to allow usage of the + standard Rust error handling. + +- MiniObject subclasses are now newtype wrappers around the underlying + GstRc wrapper. This does not change the API in any breaking + way for the current usages, but allows MiniObjects to also be + implemented in other crates and makes sure rustdoc places the + documentation in the right places. + +- BinExt extension trait was renamed to GstBinExt to prevent conflicts + with gtk::Bin if both are imported + +- Buffer::from_slice() can’t possible return None + +- Various clippy warnings + + +GStreamer Rust Plugins + +Like the GStreamer Rust bindings, the Rust plugins are now officially +part of the GStreamer project and are also maintained in the GStreamer +GitLab. + +In the 0.3.x versions this contained infrastructure for writing +GStreamer plugins in Rust, and a set of plugins. + +In git master that infrastructure was moved to the GLib and GStreamer +bindings directly, together with many other improvements that were made +possible by this, so the gst-plugins-rs repository only contains +GStreamer elements now. + +Elements included are: + +- Tutorials plugin: identity, rgb2gray and sinesrc with extensive + comments + +- rsaudioecho, a port of the audiofx element + +- rsfilesrc, rsfilesink + +- rsflvdemux, a FLV demuxer. Not feature-equivalent with flvdemux yet + +- threadshare plugin: ts-appsrc, ts-proxysrc/sink, ts-queue, ts-udpsrc + and ts-tcpclientsrc elements that use a fixed number of threads and + share them between instances. For more background about these + elements see Sebastian’s talk “When adding more threads adds more + problems - Thread-sharing between elements in GStreamer” at the + GStreamer Conference 2017. + +- rshttpsrc, a HTTP source around the hyper/reqwest Rust libraries. + Not feature-equivalent with souphttpsrc yet. + +- togglerecord, an element that allows to start/stop recording at any + time and keeps all audio/video streams in sync. + +- mccparse and mccenc, parsers and encoders for the MCC closed caption + file format. + +Changes to 0.3.X since 0.3.0 + +- All references were updated from GitHub to freedesktop.org GitLab +- Fix various links in the README.md +- Link to the correct location for the documentation + +Changes in git master for 0.4 + +- togglerecord: Switch to parking_lot crate for mutexes/condition + variables for lower overhead +- Merge threadshare plugin here +- New closedcaption plugin with mccparse and mccenc elements +- New identity element for the tutorials plugin + +- Register plugins statically in tests instead of relying on the + plugin loader to find the shared library in a specific place + +- Update to the latest API changes in the GLib and GStreamer bindings +- Update to the latest versions of all crates + + +Build and Dependencies + +- The MESON BUILD SYSTEM BUILD IS NOW FEATURE-COMPLETE (*) and it is + now the recommended build system on all platforms and also used by + Cerbero to build GStreamer on all platforms. The Autotools build is + scheduled to be removed in the next cycle. Developers who currently + use gst-uninstalled should move to gst-build. The build option + naming has been cleaned up and made consistent and there are now + feature options to enable/disable plugins and various other features + on a case-by-case basis. (*) with the exception of plugin docs which + will be handled differently in future + +- Symbol export in libraries is now controlled via explicit exports + using symbol visibility or export defines where supported, to ensure + consistency across all platforms. This also allows libraries to have + exports that vary based on detected platform features and configure + options as is the case with the GStreamer OpenGL integration library + for example. A few symbols that had been exported by accident in + earlier versions may no longer be exported. These symbols will not + have had declarations in any public header files then though and + would not have been usable. + +- The GStreamer FFmpeg wrapper plugin (gst-libav) now depends on + FFmpeg 4.x and uses the new FFmpeg 4.x API and stopped relying on + ancient API that was removed with the FFmpeg 4.x release. This means + that it is no longer possible to build this module against an older + system-provided FFmpeg 3.x version. Use the internal FFmpeg 4.x copy + instead if you build using autotools, or use gst-libav 1.14.x + instead which targets the FFmpeg 3.x API and _should_ work fine in + combination with a newer GStreamer. It’s difficult for us to support + both old and new FFmpeg APIs at the same time, apologies for any + inconvenience caused. + +- Hardware-accelerated Nvidia video encoder/decoder plugins nvdec and + nvenc can be built against CUDA Toolkit versions 9 and 10.0 now. The + dynlink interface has been dropped since it’s deprecated in 10.0. + +- The (optional) OpenCV requirement has been bumped to >= 3.0.0 and + the plugin can also be built against OpenCV 4.x now. + +- New sctp plugin based on usrsctp (for WebRTC data channels) + +Cerbero + +Cerbero is a meta build system used to build GStreamer plus dependencies +on platforms where dependencies are not readily available, such as +Windows, Android, iOS and macOS. + +Cerbero has seen a number of improvements: + +- Cerbero has been ported to Python 3 and requires Python 3.5 or newer + now + +- Source tarballs are now protected by checksums in the recipes to + guard against download errors and malicious takeover of projects or + websites. In addition, downloads are only allowed via secure + transports now and plain HTTP, FTP and git:// transports are not + allowed anymore. + +- There is now a new fetch-bootstrap command which downloads sources + required for bootstrapping, with an optional --build-tools-only + argument to match the bootstrap --build-tools-only command. + +- The bootstrap, build, package and bundle-source commands gained a + new --offline switch that ensures that only sources from the cache + are used and never downloaded via the network. This is useful in + combination with the fetch and fetch-bootstrap commands that acquire + sources ahead of time before any build steps are executed. This + allows more control over the sources used and when sources are + updated, and is particularly useful for build environments that + don’t have network access. + +- bootstrap --assume-yes will automatically say ‘yes’ to any + interactive prompts during the bootstrap stage, such as those from + apt-get or yum. + +- bootstrap --system-only will only bootstrap the system without build + tools. + +- Manifest support: The build manifest can be used in continuous + integration (CI) systems to fixate the Git revision of certain + projects so that all builds of a pipeline are on the same reference. + This is used in GStreamer’s gitlab CI for example. It can also be + used in order to re-produce a specific build. To set a manifest, you + can set manifest = 'my_manifest.xml' in your configuration file, or + use the --manifest command line option. The command line option will + take precendence over anything specific in the configuration file. + +- The new build-deps command can be used to build only the + dependencies of a recipe, without the recipe itself. + +- new --list-variants command to list available variants + +- variants can now be set on the command line via the -v option as a + comma-separated list. This overrides any variants set in any + configuration files. + +- new qt5, intelmsdk and nvidia variants for enabling Qt5 and hardware + codec support. See the Enabling Optional Features with Variants + section in the Cerbero documentation for more details how to enable + and use these variants. + +- A new -t / --timestamp command line switch makes commands print + timestamps + + +Platform-specific changes and improvements + +Android + +- toolchain: update compiler to clang and NDKr18. NDK r18 removed the + armv5 target and only has Android platforms that target at least + armv7 so the armv5 target is not useful anymore. + +- The way that GIO modules are named has changed due to upstream GLib + natively adding support for loading static GIO modules. This means + that any GStreamer application using gnutls for SSL/TLS on the + Android or iOS platforms (or any other setup using static libraries) + will fail to link looking for the g_io_module_gnutls_load_static() + function. The new function name is now + g_io_gnutls_load(gpointer data). data can be NULL for a static + library. Look at this commit for the necessary change in the + examples. + +- various build issues on Android have been fixed. + +macOS and iOS + +- various build issues on iOS have been fixed. + +- the minimum required iOS version is now 9.0. The difference in + adoption between 8.0 and 9.0 is 0.1% and the bump to 9.0 fixes some + build issues. + +- The way that GIO modules are named has changed due to upstream GLib + natively adding support for loading static GIO modules. This means + that any GStreamer application using gnutls for SSL/TLS on the + Android or iOS platforms (or any other setup using static libraries) + will fail to link looking for the g_io_module_gnutls_load_static() + function. The new function name is now + g_io_gnutls_load(gpointer data). data can be NULL for a static + library. Look at this commit for the necessary change in the + examples. + +Windows + +- The webrtcdsp element is shipped again as part of the Windows binary + packages, the build system issue has been resolved. + +- ‘Inconsistent DLL linkage’ warnings when building with MSVC have + been fixed + +- Hardware-accelerated Nvidia video encoder/decoder plugins nvdec and + nvenc build on Windows now, also with MSVC and using Meson. + +- The ksvideosrc camera capture plugin supports 16-bit grayscale video + now + +- The wasapisrc audio capture element implements loopback recording + from another output device or sink + +- wasapisink recover from low buffer levels in shared mode and some + exclusive mode fixes + +- dshowsrc now implements the GstDeviceMonitor interface + + +Contributors + +Aaron Boxer, Aleix Conchillo Flaqué, Alessandro Decina, Alexandru Băluț, +Alex Ashley, Alexey Chernov, Alicia Boya García, Amit Pandya, Andoni +Morales Alastruey, Andreas Frisch, Andre McCurdy, Andy Green, Anthony +Violo, Antoine Jacoutot, Antonio Ospite, Arun Raghavan, Aurelien Jarno, +Aurélien Zanelli, ayaka, Bananahemic, Bastian Köcher, Branko Subasic, +Brendan Shanks, Carlos Rafael Giani, Charlie Turner, Christoph Reiter, +Corentin Noël, Daeseok Youn, Damian Vicino, Dan Kegel, Daniel Drake, +Daniel Klamt, Danilo Spinella, Dardo D Kleiner, David Ing, David +Svensson Fors, Devarsh Thakkar, Dimitrios Katsaros, Edward Hervey, +Emilio Pozuelo Monfort, Enrique Ocaña González, Erlend Eriksen, Ezequiel +Garcia, Fabien Dessenne, Fabrizio Gennari, Florent Thiéry, Francisco +Velazquez, Freyr666, Garima Gaur, Gary Bisson, George Kiagiadakis, Georg +Lippitsch, Georg Ottinger, Geunsik Lim, Göran Jönsson, Guillaume +Desmottes, H1Gdev, Haihao Xiang, Haihua Hu, Harshad Khedkar, Havard +Graff, He Junyan, Hoonhee Lee, Hosang Lee, Hyunjun Ko, Ilya Smelykh, +Ingo Randolf, Iñigo Huguet, Jakub Adam, James Stevenson, Jan Alexander +Steffens, Jan Schmidt, Jerome Laheurte, Jimmy Ohn, Joakim Johansson, +Jochen Henneberg, Johan Bjäreholt, John-Mark Bell, John Bassett, John +Nikolaides, Jonathan Karlsson, Jonny Lamb, Jordan Petridis, Josep Torra, +Joshua M. Doe, Jos van Egmond, Juan Navarro, Julian Bouzas, Jun Xie, +Junyan He, Justin Kim, Kai Kang, Kim Tae Soo, Kirill Marinushkin, Kyrylo +Polezhaiev, Lars Petter Endresen, Linus Svensson, Louis-Francis +Ratté-Boulianne, Lucas Stach, Luis de Bethencourt, Luz Paz, Lyon Wang, +Maciej Wolny, Marc-André Lureau, Marc Leeman, Marco Trevisan (Treviño), +Marcos Kintschner, Marian Mihailescu, Marinus Schraal, Mark Nauwelaerts, +Marouen Ghodhbane, Martin Kelly, Matej Knopp, Mathieu Duponchelle, +Matteo Valdina, Matthew Waters, Matthias Fend, memeka, Michael Drake, +Michael Gruner, Michael Olbrich, Michael Tretter, Miguel Paris, Mike +Wey, Mikhail Fludkov, Naveen Cherukuri, Nicola Murino, Nicolas Dufresne, +Niels De Graef, Nirbheek Chauhan, Norbert Wesp, Ognyan Tonchev, Olivier +Crête, Omar Akkila, Pat DeSantis, Patricia Muscalu, Patrick Radizi, +Patrik Nilsson, Paul Kocialkowski, Per Forlin, Peter Körner, Peter +Seiderer, Petr Kulhavy, Philippe Normand, Philippe Renon, Philipp Zabel, +Pierre Labastie, Piotr Drąg, Roland Jon, Roman Sivriver, Roman Shpuntov, +Rosen Penev, Russel Winder, Sam Gigliotti, Santiago Carot-Nemesio, +Sean-Der, Sebastian Dröge, Seungha Yang, Shi Yan, Sjoerd Simons, Snir +Sheriber, Song Bing, Soon, Thean Siew, Sreerenj Balachandran, Stefan +Ringel, Stephane Cerveau, Stian Selnes, Suhas Nayak, Takeshi Sato, +Thiago Santos, Thibault Saunier, Thomas Bluemel, Tianhao Liu, +Tim-Philipp Müller, Tobias Ronge, Tomasz Andrzejak, Tomislav Tustonić, +U. Artie Eoff, Ulf Olsson, Varunkumar Allagadapa, Víctor Guzmán, Víctor +Manuel Jáquez Leal, Vincenzo Bono, Vineeth T M, Vivia Nikolaidou, Wang +Fei, wangzq, Whoopie, Wim Taymans, Wind Yuan, Wonchul Lee, Xabier +Rodriguez Calvar, Xavier Claessens, Haihao Xiang, Yacine Bandou, +Yeongjin Jeong, Yuji Kuwabara, Zeeshan Ali, + +… and many others who have contributed bug reports, translations, sent +suggestions or helped testing. + + +Stable 1.16 branch + +After the 1.16.0 release there will be several 1.16.x bug-fix releases +which will contain bug fixes which have been deemed suitable for a +stable branch, but no new features or intrusive changes will be added to +a bug-fix release usually. The 1.16.x bug-fix releases will be made from +the git 1.16 branch, which is a stable branch. + +1.16.0 + +1.16.0 was released on 19 April 2019. + + +Known Issues + +- possibly breaking/incompatible changes to properties of wrapped + FFmpeg decoders and encoders (see above). + +- The way that GIO modules are named has changed due to upstream GLib + natively adding support for loading static GIO modules. This means + that any GStreamer application using gnutls for SSL/TLS on the + Android or iOS platforms (or any other setup using static libraries) + will fail to link looking for the g_io_module_gnutls_load_static() + function. The new function name is now + g_io_gnutls_load(gpointer data). See Android/iOS sections above for + further details. + + +Schedule for 1.18 + +Our next major feature release will be 1.18, and 1.17 will be the +unstable development version leading up to the stable 1.18 release. The +development of 1.17/1.18 will happen in the git master branch. + +The plan for the 1.18 development cycle is yet to be confirmed, but it +is possible that the next cycle will be a short one in which case +feature freeze would be perhaps around August 2019 with a new 1.18 +stable release in September. + +1.18 will be backwards-compatible to the stable 1.16, 1.14, 1.12, 1.10, +1.8, 1.6, 1.4, 1.2 and 1.0 release series. + +------------------------------------------------------------------------ + +_These release notes have been prepared by Tim-Philipp Müller with_ +_contributions from Sebastian Dröge, Guillaume Desmottes, Matthew +Waters, _ _Thibault Saunier, and Víctor Manuel Jáquez Leal._ + +_License: CC BY-SA 4.0_